Pin puller



JmL-1, 1924 1,479,357

' L. C. BAYLES ET AL PIN FULLER' Filed Reb. 1923 2 Sheets-Sheet 1 man Pb A@ E HI ..m Il! a; NUM mnu a M; .wm m e f T w /Nmw f N f2 ,Sff j l .in fv `9 V y @f ,rb 1 Hw 1 JC Jam /'xwllllln K Il M 7 a. m a 2 f @A .l/f,

Jan. l, 1924 l L. c. BAYLEs ET AL PIN FULLER Filed Feb. 19::3

7 2 SheetsfSheet 2 fr x Patented Jan. l, 1924.

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LEWIS C. BAYLES, OF EASTON, PENNSYLVANIA, AND HOWARD W. MORROW, LIPSBURG-, NEW JERSEY, ASSIGNOBS TO INGERSOLL-RAND COMPANY, OFJERSEY CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

PIN PUL'LER."

Application led February 3, 1923, Serial No. 616,730. i Y Y To all whom t may concern:

Be it known that we, LEWIS C. BAYLES, a citizen of the United States, a resident of Easton, Northampton County, and State of Pennsylvania, and HOWARD W. Monnow, a citizen of the United States, a resident of Philli sburg, Warren County, and State of New ersey, have invented a certain Pin Puller, of which the following is 'a specification, accompanied by drawings. Y

This invent-ion relates to pin pullers and particularly to a device of this character adapted to operate 'in conjunction with a drill sharpening machine to withdraw the pin from aI hot drill steel, usually inserted into the bore of the steel t0- maintain the bore at its proper diameter.

Pin pullers of various types are at present used for performing the operation of removing the pin from the bore of the steel, which operation .usually requires considerable force because the pin becomes tightly wedged in the hole. Such pin pullers have been provided either as separate machines or as an adjunct to the drill sharpening machine proper, operated independently, either by hand or footpower, orby separate mechani-cal means. The pins themselves are also used in various forms some being provided wit-h heads and others being substantially straight or headless, the latter being more diiiicult to handle.

The primary object of this invention is to enable a pin puller to be conveniently mounted on or built in a stationary portion of a drill steelsharpening machine and operatively connected to a movable member of the drill sharpenerso that the pin puller is operated vby said movable membersof the drill Sharpener, instead of by separate or independent manual means, and isadapted to accommodate substantially'v straight pins without heads or other projecting portions; A further object of the invention is to simplify and improve the operating mechanism of the pin puller and to permit the pin grasping means to be automatically locked in inoperative position when not in use, manually` operatedmeans adapted to func,- tion independently ofthe movable jaw of the drill Sharpener being provided for releasingthe operating mechanism when it is 1 desired to return the operative position. A still further object is to operate the pin puller by simple and rugged mechanism 'employing a rack and pinion to effect relative movement of the drill steel and the pinv to be removed'or withdrawnv therefrom, the pin being securelyheld between clamping jaws. Furtherpobjects ofthe invention will. later appear and to all these ends the invention consists o-f the combination of elements and arrangement of parts vsubstantially as hereinafter fully described and claimed inthe following specification andillustrated in the accompanying drawings, in which- A' Figure l is a side elevation partly in section along the line 1`1 o-f Figure 2 looking in the direction of thek arrows showing a portion of a drill Sharpener having the pin pullerV operatively mounted' thereon preparatory to pulling a pin from the drill steel.v

Figure 2 is? a top plan view of the pin puller, v Y

Figure 3 is a side elevation partly broken pin grasping means to away of the pin puller showing the devicein the act of completing the pin pulling operation,

rFigure'll is a detail view of the pin grasping means after` completing the pin pulling operation, showing the ej ector' in the act of discharging the pm,

Figure 5 is an enlarged detail sectional view taken on the line 5 5 of Figure 4, and Figure 6 is a top plan view of the pin puller jaw housing and retarding device.

Referring to the dra-wings, lthe base or cylinder A of a drill Sharpener has a movable jaw member or crosshead Bl carried by the plunger rod C which is adapted to` be actuated by a piston (not sholwn)"operating F and G at the upper part of the frame and another bracket K is located at the bottom of the frame D. These brackets J' and K may be formed integrally with the opposing frame portions F and Grl or may be secured between theframe-portions'in any suitable manner. The bracket J acts as a Vsupport fora stationary member shown in the form of anabutment' Lvforming'a work support against which a' drill steel O is" adapted' to rest. This abutment may be provided with a recess P for receiving the end of the drill steel O, and also with an aperture Q adapted to receive the pin R which has been driven` into the end of the steel to maintain the diA ameter of the centralbore S and which pin RV is to be removed. The stationary abutment L may be provided with lugs T at its sides adapted to register with similar lugs U formed on thesides of the portions F and G so that bolts V may pass through these lugs to rigidly secure the stationary'abut ment/L to-'the fra-mel). f

A toothed reci-procable pin puller rack W having longitudinali side ribs X and teeth Y .is mounted to slide horizontally in guides Z between the frame portions F and G, the ribs' X traversingthe guides Zf. This pin puller rack W carries pinY grasping means shown as a pair' of upper and lower toothed jaws a and 5 suitably mounted within acap or housing c which is preferably formed integrally with the movable pin puller rack `W. In tl'iis'insta'nce the housing c is located at they end of the'rack W adjacent to the stationary abutment L. The housing c is' prevAn videdy with upper and lower backwardly and outwardly inclinedjaw guides here shown as grooves or sockets l and c respectively.

The jaws aand- Z? have opposite parallel toothed surfaces f and backwardly inclined bulb-shaped guiding ribs g so arranged that the jaws a and b are movable toward and away from eachother in the guides if and c, the toothed surfaces remaining, parallel.

A stop h isprovided at theV rearward end of the pin puller rack W, and resilient returning means shown herein a's a co'ifled Vspring j are adapted to be interposed between the stop L and' the jaws a' and bf This spring is retained at one end by flanges 7c providedV on thev rearward' ends of the jaws aand b,- and at the opposite end by a seat 0 secu-red'in an aperture 79 formed in the stop plate In rThe spring j tends to move the jaws a and b forwardly, thus causing vthe toothed surfaces f to approach each other.

Suitable ejecti-ng means are preferably provided for ejecting a pin which has been pulled, and in the present instance, we have provided an ejector pin g which is adapted to bel moved forwardly between the jaws c and Z) independently of the jaws and which extends through and is guided in an aperture rlocated inthe stop 0. Nuts g on the pin limit its forward travel. Resilient instance as rackandy-pinion mechanism operated by the crosshead, are provided for causing relative movement between' the Stationary abutmentsand the pin grasping means to effect removal of thek pin from` the steel. The rack and; pinion mechanismin cludes preferably a-V vertically reciprocable actuating rack 1 having teeth 2 andv longitu dinal ribs 3 on itsV opposite sides, these ribs 3v being adapted to slide in grooves 4J in.v the opposing facesr of the'frame portions Gr and H. The teeth2`of the rack 1 intermesh with a pinion 5 also located between theportions G and H. 'Fhe ends 6' and 7 of the shaft 8 of the pinion 5 are supported in the'frame portions G and H,- andY the end 7' of this shaft 8 extends tothe side F, as shown at 9, and is preferably provided with a sqnared portion 10 between theportions F and G. A partial gear 11 having a series of teeth 12 on a: portion of its periphery and ak nontoothed portion 13 is rigidly secured-'on the squared portion o-f the shaft 8. The tee'th112l of the gear 11 are adapted to meshy withthe teeth Y of the pin puller rack W, and as` the gear- 1f1 is fast to the pinion- 5 which in turn meshes with the teeth 2v of the vertically reciproca-ble actuating rack 1, the pin puller rack W carrying the-pin grasping means including the aws a and 7)" will be moved back and' forth i-n accordance with the' reciprocatory movement o-f the actufatinfg rack 1 the jaws a and b being closed to engage the ptn O on the backward. movement of the pin puller rack, and opened` on theforward movement into the position to receive the pin. As soon as the pin O is released by the jaws a andV o the ejector spring s will move the ejector pin Q forward, ejecting the pin R through the aperture Q. A bearing member 14 secured onY the movable crosshead B of the drill SharpenerV by bolts 15, is adapted to engage the top 1,6 of the actuating rack 1 as shown in` Figure 1, and will move the rack downward` as the crosshead B is lowered to the position shown in Figure 3.

Resilient means are preferably provided for effecting movement of the actuatingtrack 1 in theV opposite direction. These means may include a coiled spring 17 which is adapted to be secured between the projecting top portion 18 of the rack 1 andthe bracket K which is rigidly located at the loo base of the guides 4, and thisspring v17 is compressed with each downward movement of the crosshead when the pin puller is in operation. The spring 17 is provided with suitable guiding means to maintain its alignment and prevent buckling. In the present instance, the spring 17 surrounds and is guided by a plunger 19 which is screwed into the projecting portion 18 as shown at 20, and a cylinder 21 of substantially the same diameter as the plunger 19,.screwed into or otherwise suitably fixed to the brachet K, as shown at 22. The plunger 19 has a smaller diameter portion 23 which is supported and guided in the cylinder 21, and the cylinder 21 is preferably providedV with an aperture 24 at one end to maintain atmospheric pressure within the cylinder 21, thus preventing the building up of air cushions which would tend to impede movement of the plunger 19. and hence the rack 1.

When the crosshead has been lowered and the pin puller rack moved to the position illustrated in Figure 3, the gear 11 will be automatically caught and held against return movement by securing means which may include a pallet or catch 25 secured to a handle 26 and pivoted between the frame portions F and G as shown at 29, so that the weight of the handle 26 normally causes the pallet 25 to bear against the nontoothed surface 13 of the gear 11 until the gear 11 reaches a point where the pallet 25 enters the notch 30 adjacent to the last tooth 31 which will be when the crosshead B has practically descended to the limitV of its movement. The pin pulling apparatus Vis thus held in inoperative position against the force of the spring 17 with the movable pin grasping means and pin ejector retracted so that the drill sharpening machine may be freely used for other operations without actuating the pin puller. Wien it is desired to restore the pin puller to operation, the handle 26 is manually raised slightly, turning the pallet 25 on its axis 29 so that the pallet leaves the tooth 31, whereupon the gear 11 will be'released and the spring 17 will cause the vertically reciprocable actuating rack 1 to rise. This reverse movement of the actuating rack results in corresponding reverse movement ofthe pinion 5, gear 11, pin puller rack W, cap 0 pin grasping jaws a and Z) and pin ejector g, and the rising movement of the rack continues until the pin grasping jaws a and 7) return to initial position against the abutment L. After each pin pulling operation, the crosshead B and handle 26 are preferably raised to permit the pin puller rack W toV return to initial position after the pin has been pulled from a steel. During such forward movement the pin ejector will engage the pin, the pin will be carried to the front of the machine, and automatically ejected.

The pin puller is locked in its inoperative position by a succeeding 'descending movement of the crosshead.

lWe have found it desirable in practice to provide a retarding device or retainer to insure the proper operation of the clamping jaws a and b. The spring 17 which returns the crossheadl actuating rack and pin puller rack to operative position vwhen released,V

be'practically fully retracted to receive the pin and the housing c must be against the stationary abutment L to prevent the spring j from closing the jaws a and b. lWhen in this position,V however, the spring vj is lheld against the jaws and acts upon thestop plate it., This hasv a tendency to overcome the force of the spring 17, moving the pin puller rack W away from the' stationary abutment L, and the jaws close. A suitable retarding device is therefore provided to exert sulhcient restraint upon 'the housing to prevent the spring y' .from causing premature movement of the pin puller rack. In the present instance, we employ a pair of clamps l32, the vertical sides 33`of which are mounted on opposite sides of the pin puller frame and are secured by a bolt 34. passing through a transverse hole' 35 in thefbraclret J. The tops 36 of the clamps 32project over the frame portions F and Gand the space between the opposite ends of the top portions 36 in the path of travel of -the housing c is normally slightly less than the width of the housing, and resilient means, which may be a spring 37, are preferably interposed between one of the sides 33 and the bolt head 38 at one side of the frame to cause the clamps32 topexert a certain degree of pressure upon the housing. lAdjustment of the tension of the spring v37 is effected by screwing ofthe nut 39 located against the clamp at the opposite side ofthe frame. The housing 0 passes betweenfthe clamp portions 36 when returning to position against thestationary abutment and is held under just sufficient pressure to overcome the tendency ofthe spring 7' to counteract the force of the spring 17.

The diameter of the gear 11'is preferably greaterthan that of the pinion 5 in order to transmit motion which-will result in the pin puller rack W obtaining a greater length of travel than the distance traveled by the crosshead B. This is necessary because in practical use the pins R are generally of considerable length, while the movement of the crosshead is comparatively slight. In the present instance the diameter of the gear V1l is substantially twice that of the pinion 5 which enables the rack W to move substantially twice the distance traveled by the crosshead B in its raising and lowering movement.

VWe claim: Y

l. A pin puller for a drill Sharpener having a stationary base and a movable crosshead, saidpin pullerfcomprising means for holding the drill steel, clamping means adapted to securely grasp the pin, and rack and pinion mechanism actuated by the crosshead for effecting movement of said clamping means relative to the steel to withdraw the pin from the steel.

2. A pin puller for a drill Sharpener having a stationary base and a movable crosshead, said pin puller comprising means tor holding the drill steel, clamping means adapted to securely grasp the pin, rack and pinion mechanism actuated by the crosshead for eli'ecting movement of said pin grasping means relative to the steel to withdraw the pin from the steel, and means adapted to retain said pin puller in inoperative position. f

3. A pin puller/for a drill Sharpener having a stationary base and a movable crosshead, said pin puller'comprising means for holding the drill steel, means for grasping the pin, rack and pinion mechanism operated by the crosshead yfor effecting movement of said pin grasping means relative to the steel to withdraw the pin from the steel,

f means adapted to retain said pin grasping means in inoperative position, and means for restoring said pin grasping means to operative position.

4:. A pin puller for a drill Sharpener having a stationary base and a movable crosshead, said pin puller comprising means for holding the drill steel relatively movable, jaws adapted to grasp the pin, rack and pinion mechanism operated by the crosshead for eecting movement of said pin grasping means relative to the steel to withdraw the pin from the steel, and automatic means adapted to retain said pin grasping means in inoperative position.

5. A pin puller for a drill Sharpener having a stationary base and a movable crosshead, said pin puller comprising means for holding the drill steel, relatively movable jaws adapted to securely grasp the pin, rack and pinion mechanism operated by the crosshead for effecting movement of said pin engaging means relative to the steel to withdraw the pin from the steel, automatic means adapted to retain said pin grasping jaws in inoperative position, and manually released means for restoring said jaws to operative position.

6. A pin puller adapted to be associated with a drill sharpening machine having a movable crosshead, said pin puller compris- 7. A pin puller adapted to be associated Y with drill sharpening machine having a movable crosshead, said pin puller comprising a stationary member, relatively movable pin grasping jaws, and means for effecting relative movement ofsaid elements to cause the removal of the pin from said steel', said last mentioned means being actuated by movement of the movable crosshead of the sharpening machine, means independent of the crosshead Jfor retaining said crosshead actuated means in inoperative position, and means for causing said crosshead actuated means to return to initial position. Y

8. A pin puller adapted to be associated with a drill sharpening machine having a movable crosshead, said pin puller including a stationary member and relatively movable pin Vgrasping jaws, a pin puller rack and a pinion adapted to effect movement of said pin grasping jaws to cause the removal of the pin from said steel, said pin puller rack and pinion being actuated by movement of the movable crosshead or" the drill sharpening machine, and means for retaining said pin puller rack and pinion in inoperative position. Y

9. A pin puller adapted to be associated with a drill sharpeningmachine having a movable crosshead', said pin puller comprising a stationary abutment, relatively movable clamping jaws, a pin puller rack and pinion adapted to effect movement ofsaid jaws relative to the steel to cause the removal of the pin from said steel, said pin puller rack and pinion being actuated by movement of the movable crosshead of the drill sharpening machine, means for retaining the jaws in withdrawn position, and means for causing said jaws to return to initial position.

' l0.' A pin puller adapted to be associated with a drill sharpening machine havinga vertically movable crosshead, said pin puller comprising a stationary member and relatively movable pin grasping jaws, rack and pinion mechanism actuated by said crosshead for moving said jaws to cause the removal of the pin from the steel, automatic vmeans for retaining said jaws in the moved position, and manually released means for returning said jaws to their initial' position.

ll. In a pin puller for pulling a pin from an object, a stationary' base, a movable crosshead, a ystationary abutment against which the object is adapted-to rest, and' relatively movable jaws adapted to grasp the pin, said abutment being mountedon said stationary base, rack and pinion mechanism actuated by the croshead kfor moving the jaws away from the stationary abutment to cause removal-of the pin, from the object, and means independent ofthe' crosshead adapted to retain said rack and pinion mechanism in inoperative position.` Y j 12. In a pin puller for pullinga pin from an object, a stationary base, movable crosshead, a stationary abutment against which the object is adaptedto rest, and relatively movable pin grasping jaws, said abutment being mounted on said stationary base, rack and pinion mechanism actuated by the crosshead for moving the jaws away from the stationary abutment,` Vmeans independent of the crosshead adapted to retain said rack and pinion mechanism in inoperative position and means for restoring said rack and pinion mechanism to operative position.

13. In a pin puller for pulling a pin from an object, a stationary base, a vertically movable crosshead, a stationary abutment against which the object is adapted to rest, a horizontally movable jaw carrier, and jaws adapted to grasp the pin, rack and pinion mechanism actuated by the crossliead for moving the jaw carrier away from the stationary abutment,l and means adapted to retain said rack and pinion mechanism in inoperative position andto cause the same to return to operative position.

14. A pin puller adaptable for association with a drill sharpening machine having a stationary base and a movable crosshead, said pin puller including a stationary member and movable pin grasping means, rack and pinion mechanism actuated by the crosshead for eii'ecting movement of said pin grasping means to cause the removal of the pin from the steel,and automatic means independent of the crosshead :for retaining said rack and pinion mechanism in inoperative position.

15. A pin puller adaptable for association with a drill sharpening machine having a stationary base and a Vmovable crosshead, said pin puller including a stationary member and relatively movable pin grasping jaws, rack and pinion mechanism actuated by the crosshead for effecting movement of said pin grasping jaws to cause the removal of the pin from the steel, automatic means independent of the crosshead for retaining said rack and pinion mechanism in inoperative position, and manually actuated means for permitting said rack and pinion mechanism to return to operative position.

16. A pin puller adapted to be mounted at the side of a drill sharpening machine having-a stationary base and a vertically 17.` A pin pullerA adapted tobemounted at the sideo't al drill sharpening machine` havingVV astationary baseand a vertically movablecrosshead, said pinpuller comprising a stationary member and horizontally movable pin grasping means, Yrack and pinion mechanism actuated by the crosshead for eliecting movement `of said pin grasping means to causev the removal of the pin from the steel, automatic means independent of the crosshead 'for retaining said pin grasping means vin inoperative position, manually released means permitting said pin grasping means to return to operative position7 and means for ejecting the pin.

18.'A pin puller adapted to be mounted at the side of a drill sharpening machine having a stationary base and a movable crosshead, said pin puller comprising a stationary member and movable pin grasping means, rack and pinion mechanism actuated by the crosshead for effecting movement of said pin grasping means to cause removal of the pin from the steel, automatic means independent of the crosshead for retaining said pin grasping means in the moved position, manually released spring actuated means for causing said movable pin engaging means to return to operative position, and means for preventing unintentional movement of said pin grasping means. i 19. A pin puller for pulling a pin from an object comprising a stationary base, a movable crosshead, a stationary abutment 'against which'the object is adapted to rest,

a reciprocable pin puller rack, a jaw carrier on said rack having jaws adapted to grasp the pin, a multilated gear adapted to engageV the teeth of said pin puller rack, a pinion fast to said gear, a reciprocable actuating rack adapted to actuate said pinion, bearing means on the movable crosshead adapted to engage and depress said reciprocable actuatingrack when the crosshead is lowered, causing movement of said jaw carrier and jaws away from the stationary abutment, automatic means adapted to retain said jaws in inoperative position and manual means for releasing said automatic means to cause the jaws to be returned to their initial operative position when the movable crosshead is raised.

' 20. A pin Vpuller adaptable for association with 'a drill sharpening machine having a' stationary hase -ancl a vertically movable crosshead, said fpin puller Comprising a Vstationen-y tabutment against which Ythe object kis `adapted to lrest, and movable clamping Y gear; adapted to' engage fthe iteeth of said pin puller Tack, a pinion -'avst tosaid gear, a vertically reciprocahle actuatinglrack adapted to actuate said pin-ion, lresilient Tneans tendingfto urge Ythe ireeiprocable actuating ra'k to its operating yposition, hearing means on themovable crosshead 'adapted to engage'and depress the rec'iprocable actuating mack :when )the erosshead vis lowered, causing movement 'U fthe 'ielfainping jaws away :fromithe stationany abutment, a rpallet adapted to engage Va tooth :of the :mutilated `Vgear Ito `retain-sailY' damping jaws `in inoperative position against said spri'n'g, means for lreleasing said `,pallet to vperrnift the L:spring to effect Athe =return :of lthe movable elaniping jaws to EtheiiinitialL operative position 'when fthe :movable `crosshebad is raised, and Vresilient means fior ejecting lthe pin. v

In testimonywhereofv Awe Vhave fs'i-gned' this specification.

' LEW'ISZCi BAYDES.

fHUWRD W. MORROW. 

